|本期目录/Table of Contents|

[1]董宪伟,崔静,董轩萌,等.不同氧体积分数影响预氧化煤自燃特性研究*[J].中国安全生产科学技术,2025,21(7):62-69.[doi:10.11731/j.issn.1673-193x.2025.07.008]
　DONG Xianwei,CUI Jing,DONG Xuanmeng,et al.Effect of different oxygen volume fractions on spontaneous combustion characteristics of pre-oxidized coal[J].Journal of Safety Science and Technology,2025,21(7):62-69.[doi:10.11731/j.issn.1673-193x.2025.07.008]
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不同氧体积分数影响预氧化煤自燃特性研究*

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
21
期数:
2025年7期
页码:
62-69
栏目:
职业安全卫生管理与技术
出版日期:
2025-07-30

文章信息/Info

Title:
Effect of different oxygen volume fractions on spontaneous combustion characteristics of pre-oxidized coal
文章编号:
1673-193X(2025)-07-0062-08
作者:
董宪伟; 崔静; 董轩萌; 王福生; 于铭漪
（1.华北理工大学 应急管理与安全工程学院，河北 唐山 063210；
2.华北理工大学 河北省矿业开发与安全技术重点实验室，河北 唐山 063210；
3.华北理工大学 矿业工程学院，河北 唐山 063210）
Author(s):
DONG Xianwei; CUI Jing; DONG Xuanmeng; WANG Fusheng; YU Mingyi
(1.School of Emergency Management and Safety Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China;
2.Hebei Key Laboratory of Mining Development and Safety Technology,North China University of Science and Technology,Tangshan Hebei 063210,China;
3.College of Mining Engineering,North China University of Technology,Tangshan Hebei 063210,China)
关键词:
煤自燃; 二次氧化; 活化能; 氧体积分数; 预氧化煤
Keywords:
coalspontaneous combustion;  secondary oxidation; activation energy; oxygen volume fraction; pre-oxidized coal
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2025.07.008
文献标志码:
A
摘要:
为研究不同氧体积分数作用下预氧化煤的燃烧特性规律，以褐煤为例，设置80 ℃和180 ℃的氧化温度制取预氧化煤，采用热重实验探究不同氧体积分数下（0%，8%，15%，21%）预氧化煤自燃特性。研究结果表明：在8%的氧体积分数下，180 ℃预氧化煤较80 ℃煤特征温度点T5前移28.19 ℃，活化能降低13.52 kJ/mol，预氧化温度越高自燃倾向越强；80 ℃预氧化煤在21%的氧体积分数下活化能较0%的氧体积分数时低15.20 kJ/mol，特征温度点T7前移36.24 ℃，氧体积分数的升高加剧自燃风险；高温（180 ℃）与高氧（21%）时煤样活化能最低（50.25 kJ/mol），燃点温度及失重速率温度降幅显著，其自燃风险性最高。研究结果可为精准防控采空区遗煤自燃现象提供实验基础。
Abstract:
In order to investigate the combustion characteristics of pre-oxidized coal under different oxygen volume fractions,taking lignite as an example,pre-oxidized coal was prepared at oxidation temperatures 80 ℃ and 180 ℃,and the spontaneous combustion characteristics of pre-oxidized coal under different oxygen volume fractions (0%,8%,15% and 21%) were investigated by thermogravimetric experiments.The results show that under 8% oxygen volume fraction,the characteristic temperature point T5 for pre-oxidized coal at 180 ℃ decreased by 28.19 ℃ compared to coal 80 ℃ sample,with activation energy decreased by 13.52 kJ/mol-thus indicating higher pre-oxidation temperatures increase spontaneous combustion tendency.Conversely,for 80 ℃ coal pre-oxidized under 21% oxygen volume fraction,activation energy was 15.20 kJ/mol lower than under 0% oxygen volume fraction,while characteristic temperature point T7 decreased by 36.24 ℃,demonstrating that elevated oxygen levels intensify spontaneous combustion risk.Critically,under combined high-temperature (180 ℃) and high-oxygen (21%) conditions,the coal sample exhibited the lowest activation energy (50.25 kJ/mol),along with a significant decreased ignition and maximum weight-loss temperatures,consequently indicating the highest spontaneous combustion risk.These findings provide an experimental basis for the precise prevention and control of spontaneous combustion in residual coal within goaf areas.

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备注/Memo

备注/Memo:
收稿日期： 2025-03-24
* 基金项目： 国家重点研发计划项目(2023YFC3009105)；国家自然科学基金项目(51974128)
作者简介： 董宪伟，博士，教授，主要研究方向为矿井火灾防治。
通信作者： 董轩萌，博士，讲师，主要研究方向为矿井火灾防治。
更新日期/Last Update: 2025-07-28